<header class="site-header">

  <div class="wrapper">
    {%- assign default_paths = site.pages | map: "path" -%}
    {%- assign page_paths = site.header_pages | default: default_paths -%}
    {%- assign titles_size = site.pages | map: 'title' | join: '' | size -%}
    <a class="site-title" rel="author" href="{{ "/" | relative_url }}">{{ site.title | escape }}</a>

    {%- if titles_size > 0 -%}
      <nav class="site-nav">
        <div class="trigger">
          {%- for path in page_paths -%}
            {%- assign my_page = site.pages | where: "path", path | first -%}
            {%- if my_page.title -%}
            <a class="page-link" href="{{ my_page.url | relative_url }}">{{ my_page.title | escape }}</a>
            {%- endif -%}
          {%- endfor -%}
          <a class="page-link" href="https://links.raoyi.net/">网址导航</a>
        </div>
      </nav>
    {%- endif -%}
  </div>
</header>
